I am trying to install a problem tracking application (PTS/Keystone from Stonekeep) on to a Linux server.

The requirements for the server/application are:
Apache,
PHP3 (with Apache compiled in as an apache module),
Mysql database

I have created a test file called test.php containing <?PHP_INFO();?>
When I point my browser to the test file located in /usr/local/apache/htdocs, I get the required system information. But if I point my browser to the Keystone file index.php3, in the same location, I get no response at all. If I copy the file from index.php3 to index.php4, and point my browser at it all I get is a display of the physical script, i.e. the actual lines of code, not the screen display.

I have installed PHP4 instead of PHP3 as I was informed that the parser was backward compatible. Is this part of my problem? If so can I install PHP3 and make it co-exist with PHP4, or do I have to scrub PHP4?

Also, I have installed my application in a directory /usr/local/www/data/keystone, do I need to change any parameters in Apache’s configuration to pick up this directory??